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Dynamic imaging with multiple resolutions along phase‐encode and slice‐select dimensions
Author(s) -
Panych Lawrence P.,
Zhao Lei,
Jolesz Ferenc A.,
Mulkern Robert V.
Publication year - 2001
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.1126
Subject(s) - encode , computer science , encoding (memory) , hadamard transform , temporal resolution , volume (thermodynamics) , phase (matter) , resolution (logic) , image resolution , wafer , computer vision , artificial intelligence , optics , physics , chemistry , biochemistry , optoelectronics , quantum mechanics , gene
An implementation is reported of an imaging method to obtain MUltiple Resolutions along Phase‐encode and Slice‐select dimensions (MURPS), which enables dynamic imaging of focal changes using a graded, multiresolution approach. MURPS allows one to trade spatial resolution in part of the volume for improved temporal resolution in dynamic imaging applications. A unique method of Hadamard slice encoding is used, enabling the varying of the phase encode and slice resolution while maintaining a constant effective TR throughout the entire 3‐D volume. MURPS was implemented using a gradient‐recalled echo sequence, and its utility was demonstrated for MR temperature monitoring. In this preliminary work, it has been shown that changes throughout a large volume can be effectively monitored in times that would normally only permit dynamic imaging in one or a very few slices. Magn Reson Med 45:940–947, 2001. © 2001 Wiley‐Liss, Inc.